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/*
* Copyright 2019 by its authors. See AUTHORS.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef EOLIAN_CXX_STRING_HH
#define EOLIAN_CXX_STRING_HH
#include <cstdlib>
#include <cstring>
#include "grammar/generator.hpp"
#include "grammar/attributes.hpp"
#include "grammar/case.hpp"
namespace efl { namespace eolian { namespace grammar {
// literal
struct literal_generator
{
literal_generator(const char* string)
: string(string) {}
template <typename OutputIterator, typename Attribute, typename Context>
bool generate(OutputIterator sink, Attribute const&, Context const&) const
{
std::copy(string, string + std::strlen(string), sink);
return true;
}
const char* string;
};
inline literal_generator as_generator(char const* literal) { return literal; }
struct {
literal_generator operator()(const char* literal) const
{
return literal_generator(literal);
}
} const lit = {};
// string
struct string_generator
{
template <typename OutputIterator, typename Attribute, typename Context>
bool generate(OutputIterator sink, Attribute const& attribute, Context const&) const
{
if(tag_check<upper_case_tag, Context>::value)
{
std::transform(std::begin(attribute), std::end(attribute), sink, &::toupper);
}
else if(tag_check<lower_case_tag, Context>::value)
{
std::transform(std::begin(attribute), std::end(attribute), sink, &::tolower);
}
else
{
std::copy(std::begin(attribute), std::end(attribute), sink);
}
return true;
}
};
struct specific_string_generator
{
specific_string_generator(std::string string) : string(string) {}
template <typename OutputIterator, typename Context>
bool generate(OutputIterator sink, attributes::unused_type, Context const&) const
{
if(tag_check<upper_case_tag, Context>::value)
{
std::transform(std::begin(string), std::end(string), sink, &::toupper);
}
else if(tag_check<lower_case_tag, Context>::value)
{
std::transform(std::begin(string), std::end(string), sink, &::tolower);
}
else
{
std::copy(std::begin(string), std::end(string), sink);
}
return true;
}
std::string string;
};
struct string_replace_generator
{
template <typename OutputIterator, typename Attribute, typename Context>
bool generate(OutputIterator sink, Attribute const& string, Context const&) const
{
if(tag_check<upper_case_tag, Context>::value)
{
std::transform(std::begin(string), std::end(string), sink,
[&] (char c) -> char
{
if(c == from)
return to;
else
return ::toupper(c);
}
);
}
else if(tag_check<lower_case_tag, Context>::value)
{
std::transform(std::begin(string), std::end(string), sink,
[&] (char c) -> char
{
if(c == from)
return to;
else
return ::tolower(c);
});
}
else
{
std::transform(std::begin(string), std::end(string), sink
, [&] (char c) { return c == from ? to : c; });
}
return true;
}
char from, to;
};
struct string_generator_terminal
{
specific_string_generator operator[](std::string string) const
{
return specific_string_generator{string};
}
} const string = {};
struct string_replace_terminal
{
string_replace_generator operator()(char from, char to) const
{
return string_replace_generator{from, to};
}
} const string_replace = {};
template <>
struct is_eager_generator<literal_generator> : std::true_type {};
template <>
struct is_generator<literal_generator> : std::true_type {};
template <>
struct is_generator<const char*> : std::true_type {};
template <int N>
struct is_generator<const char[N]> : std::true_type {};
template <>
struct is_eager_generator<string_generator> : std::true_type {};
template <>
struct is_eager_generator<specific_string_generator> : std::true_type {};
template <>
struct is_eager_generator<string_replace_generator> : std::true_type {};
template <>
struct is_generator<string_generator> : std::true_type {};
template <>
struct is_generator<specific_string_generator> : std::true_type {};
template <>
struct is_generator<string_replace_generator> : std::true_type {};
template <>
struct is_generator<string_generator_terminal> : std::true_type {};
template <>
struct is_generator<std::string> : std::true_type {};
inline string_generator as_generator(string_generator_terminal)
{
return string_generator{};
}
namespace type_traits {
template <>
struct attributes_needed<string_generator> : std::integral_constant<int, 1> {};
template <>
struct attributes_needed<string_generator_terminal> : std::integral_constant<int, 1> {};
template <>
struct attributes_needed<string_replace_generator> : std::integral_constant<int, 1> {};
}
} } }
namespace std {
inline ::efl::eolian::grammar::specific_string_generator as_generator(std::string string)
{
return ::efl::eolian::grammar::specific_string_generator{string};
}
}
#endif
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